EP0774670A1 - Dispositif d'aimants pour un appareil de diagnostique par résonance magnétique - Google Patents

Dispositif d'aimants pour un appareil de diagnostique par résonance magnétique Download PDF

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Publication number
EP0774670A1
EP0774670A1 EP96117428A EP96117428A EP0774670A1 EP 0774670 A1 EP0774670 A1 EP 0774670A1 EP 96117428 A EP96117428 A EP 96117428A EP 96117428 A EP96117428 A EP 96117428A EP 0774670 A1 EP0774670 A1 EP 0774670A1
Authority
EP
European Patent Office
Prior art keywords
magnet arrangement
arrangement according
turns
axis
imaging volume
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96117428A
Other languages
German (de)
English (en)
Other versions
EP0774670B1 (fr
Inventor
Georg Frese
Michael Sellers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0774670A1 publication Critical patent/EP0774670A1/fr
Application granted granted Critical
Publication of EP0774670B1 publication Critical patent/EP0774670B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/3806—Open magnet assemblies for improved access to the sample, e.g. C-type or U-type magnets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field

Definitions

  • the invention relates to a magnet arrangement for a diagnostic magnetic resonance device with an electromagnet arrangement for generating an essentially homogeneous magnetic field aligned along an axis in an imaging volume, with a transverse access to the imaging volume being formed with respect to the axis.
  • Almost every manufacturer of diagnostic magnetic resonance devices today offers open systems. These are usually low-field systems with two pole pieces that generate a main magnetic field that is constant over time and whose homogeneous field area determines the imaging volume. The systems have patient access and offer additional access to the imaging volume for a doctor or examiner.
  • the pole pieces are connected to each other with a flux return, which can be H-shaped (i.e. symmetrical) or C-shaped. Coils or permanent magnets are used as magnetic drives, which are located in the pole pieces themselves or in the flux return.
  • a magnet arrangement of the type mentioned is described in US Pat. No. 5,345,208. Pole shoes arranged opposite one another are connected to one another via a C-shaped magnetic feedback. An electromagnet arrangement in the form of a superconducting coil is in the return.
  • a magnet arrangement of the type mentioned is also known from US Pat. No. 4,902,995.
  • the main magnetic field is generated there by two superconducting coils which are arranged opposite one another and have the same design.
  • the invention is based on the object of specifying an open magnet arrangement with which a high magnetic field strength can be generated in an imaging volume.
  • the electromagnet arrangement comprises first and second turns which are spaced apart transversely to the axis and that an axial access to the imaging volume is formed between the first and second turns in relation to the axis.
  • first and second turns each comprise first and second turn sections which are oriented perpendicular to the axis in a circumferential direction of the imaging volume, and that the first turn sections are arranged closer to the imaging volume than the second turn sections.
  • the first winding sections arranged closer to the imaging volume generate the useful field aligned along the axis in the imaging volume.
  • the second outer winding sections shield the magnetic field from the outside at least in part, so that the stray field drops to a similar extent as in an actively shielded standard magnet arrangement.
  • the first winding sections are designed in the shape of an arc, with a concave side of the first winding sections facing the imaging volume. Although this limits the axial access somewhat, it also homogenizes the magnetic field in the transverse direction.
  • a particularly advantageous embodiment is characterized in that the first and second turns in several opposite arranged first and second coils are combined. If the number of ampere turns of the coils increases from the center to the outside, the magnetic field can be homogenized in the axial direction.
  • Another particularly advantageous embodiment is characterized in that the winding sections of different coils are of different lengths.
  • the size of the homogeneous imaging volume can thus be improved, in particular in the axial direction.
  • a second number of turns is arranged essentially on surfaces oriented obliquely to the first axis.
  • At least one annular coil is arranged coaxially to the first axis on at least one end face of the first and second turns. The side access for the doctor remains.
  • first and second windings are connected to one another via a C-shaped stand arranged outside the imaging volume in order to support and absorb the weight and / or Lorentz forces.
  • the first windings are connected with the second windings for support by column-like stands, which are arranged on both sides of the accesses.
  • This support is particularly advantageous in the case of a magnet arrangement with additional outer annular coils.
  • the first and second windings are wound on a ferromagnetic carrier to increase the field.
  • FIG. 1 schematically shows a magnet arrangement with electromagnets for a diagnostic magnetic resonance device.
  • the magnet arrangement With a corresponding excitation with a direct current in the center in an imaging volume 2, the magnet arrangement generates an essentially homogeneous magnetic field Bo.
  • the magnetic field Bo which is symbolized in FIG. 1 by an arrow, is aligned parallel to an axis 6.
  • the axis 6 is also an axis of symmetry of the electromagnet arrangement.
  • the electromagnet arrangement comprises six first and second coils 8 and 10, each with several hundred first and second turns, which are wound on a carrier (not shown here).
  • the carrier can be used as an iron core
  • Amplification of the magnetic field Bo can be formed in the imaging volume 2.
  • the first and second coils 8 or 10 or first and second turns are arranged opposite one another transversely to the axis 6. In this way, an axial access 12 is created in relation to the axis 6 and a transverse access 14 is created transversely thereto.
  • the axial access 12 is designed for introducing the patient to the imaging volume 2, while the transverse access 14 gives a doctor the possibility of performing interventions on patients during a magnetic resonance examination.
  • the first and second turns in the first and second coils 8 and 10 each include first and second turn sections 16 and 18, respectively, which are oriented perpendicular to the axis 6 in a circumferential direction of the imaging volume 2.
  • the winding sections 16, 18 are each connected to one another via radial conductor pieces 19.
  • the first winding sections 16 are arranged closer to the imaging volume 2 than the second winding sections 18.
  • the first and second winding sections 16, 18 are arcuate and face the imaging volume 2 with their concave side. They cover an angle of preferably approximately 120 ° in the circumferential direction around the axis 6.
  • the individual coils 8, 10 are connected to a direct current supply, not shown here, as a result of which a current flows in the individual turns, for example in the direction of the arrows 20 drawn in two coils 8 and 10.
  • the remaining coils 8, 10 are flowed through in the same direction by the current, so that a current flows about the axis 6 counterclockwise in all first winding sections 16 and a current flows clockwise in all second winding sections 18.
  • the radial distance of the first and second winding sections 16, 18 from one another determines the shielding effect for the magnetic field to the outside and the strength of the magnetic field Bo in the imaging volume 2.
  • the radial distance should be as small as possible to keep the size within reasonable limits, but on the other hand it should be as large as possible in order not to reduce the useful field in the imaging volume 2 too much. A compromise can be found between the two opposing demands.
  • FIG. 2 shows a perspective view of a construction of the magnet arrangement in which the two coils arranged opposite one another are connected to one another via a C-shaped stand 22.
  • the coils 8 and 10 are each structurally combined to form oppositely arranged coil packs.
  • the C-shaped stand 22 allows three-sided access to the imaging volume 2.
  • the coils 8, 10 are located in a cryostat, whereby the stand 22 can be part of the cyrostat (not shown here).
  • FIG. 3 now shows a constructional design with four-sided access to the imaging volume 2.
  • the first and second coils 8 and 10, which are combined to form a coil package, are connected here via column-shaped stands 24 arranged at the ends.
  • FIG. 4 shows in principle a magnet arrangement in which the imaging volume 2 is enlarged, in particular in the axial direction.
  • two annular coils 30, 32 are arranged on the front ends of the first and second oppositely arranged coils 8 and 10.
  • the diameter of the coils 30, 32 can be smaller than the diameter D shown in FIG. 1, which is determined by the inner winding sections 16 of the coils 8 and 10.
  • the coils 30 and 32 are also connected to a power supply (not shown here) which generate a current flow in the same direction as on the first winding sections 16 of the coils 8 and 10.
  • the coils 30 and 32 generating the useful field are surrounded by shielding coils 34 and 36.
  • the inner five coils 8.1 and 10.1 in contrast to the two adjoining outer coils 8.2 and 10.2, have an opening angle of only 900.
  • the columnar support already shown in FIG. 3 is particularly suitable for the magnet arrangement shown in FIG at the ends of the coil packs.
  • FIG. 5 now shows an arrangement of the first and second coils 8, 10, the center of the circular ring segments formed by the windings not being displaced on the axis 6 but transversely to the access 14 in the vertical direction.
  • the homogeneity of the magnetic field Bo in the transverse direction that is to say towards the transverse accesses 14, is thus improved.
  • the center of curvature of the coil segment-shaped coil 8 is identified by 40 and the center of curvature of the coil segment-shaped coil 10 is identified by 42.
  • the winding form of the first and second coils 8 and 10 shown in FIG. 6 also improves the homogeneity in the transverse direction in the examination room.
  • the center of curvature of the first winding sections of the upper coil 8 is identified by 44 and the center of curvature of the first winding sections 16 of the lower coil 10 is identified by 46.
  • the center of curvature of the outer second arcuate winding sections 18 lies on the axis 6.
  • FIG. 7 shows a side view in a basic sectional view of a magnet arrangement, only central coils 8.3 and 10.3 being arranged in planes oriented perpendicular to the first axis 6.
  • outer coils 8.4 and 10.4 are arranged on surfaces which are oriented obliquely to the first axis 6. The oblique orientation improves the shielding effect of the magnet arrangement on the outside at the axial entrances.

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
EP96117428A 1995-11-16 1996-10-30 Dispositif d'aimants pour un appareil de diagnostique par résonance magnétique Expired - Lifetime EP0774670B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542812 1995-11-16
DE19542812 1995-11-16

Publications (2)

Publication Number Publication Date
EP0774670A1 true EP0774670A1 (fr) 1997-05-21
EP0774670B1 EP0774670B1 (fr) 2002-05-02

Family

ID=7777665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117428A Expired - Lifetime EP0774670B1 (fr) 1995-11-16 1996-10-30 Dispositif d'aimants pour un appareil de diagnostique par résonance magnétique

Country Status (4)

Country Link
US (1) US5708362A (fr)
EP (1) EP0774670B1 (fr)
JP (1) JPH09168527A (fr)
DE (1) DE59609147D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1300688A3 (fr) * 2001-10-02 2003-10-15 Esaote S.p.A. Un aimant supraconducteur, en particulier pour appareil d'imagerie RM
US6958577B2 (en) 2001-05-28 2005-10-25 Esaote, S.P.A. Apparatus for imaging the inner part of a body, particularly for diagnostic imaging thereof
US7482808B2 (en) * 2003-02-28 2009-01-27 Hitachi, Ltd. Superconductive magnet apparatus and magnetic resonance imaging apparatus

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033100A1 (fr) * 1998-11-27 2000-06-08 Koninklijke Philips Electronics N.V. Systeme d'imagerie par resonance magnetique
JP2000247946A (ja) 1999-02-26 2000-09-12 Fuji Photo Film Co Ltd グアニジン化合物および感熱記録材料
GB2355799B (en) * 1999-10-26 2004-02-04 Oxford Magnet Tech Magnet with improved access
GB0006356D0 (en) * 2000-03-17 2000-05-03 Mansfield Peter Active acoustic control in gradient coil design for MRI
DE10147742B4 (de) 2001-09-27 2005-05-19 Siemens Ag Magnetresonanzgerät mit einem horizontalen Grundmagnetfeld
US20040041565A1 (en) * 2002-05-08 2004-03-04 Shigeru Kakugawa NMR magnet device for solution analysis and NMR apparatus
US6812705B1 (en) 2003-12-05 2004-11-02 General Electric Company Coolant cooled RF body coil
US20050127913A1 (en) * 2003-12-12 2005-06-16 Seth Berger Lc coil
JP4118833B2 (ja) * 2004-04-16 2008-07-16 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー Ｍｒｉ用コイル
US7579838B2 (en) * 2005-11-18 2009-08-25 General Electric Company Systems, methods and apparatus for a partially elongated field of view in a magnetic resonance imaging system
JP4651529B2 (ja) * 2005-12-22 2011-03-16 三菱電機株式会社 Ｍｒｉ用電磁石装置
WO2007140089A2 (fr) * 2006-05-25 2007-12-06 Koninklijke Philips Electronics, N.V. Bobines à gradient transversal asymétrique tridimensionnel
JP4921935B2 (ja) * 2006-11-22 2012-04-25 株式会社日立製作所 電磁石装置及び磁気共鳴撮像装置
DE102012101988B4 (de) * 2012-03-09 2014-07-17 Maschinenfabrik Reinhausen Gmbh Anordnung einer Luft-Drosselspule und eines Umschalters sowie Verfahren zur Herstellung einer solchen Anordnung
AU2015236298B2 (en) 2014-03-24 2018-08-09 Apple Inc. Magnetic shielding in inductive power transfer
US9460846B2 (en) * 2014-06-20 2016-10-04 Apple Inc. Methods for forming shield materials onto inductive coils
US10699842B2 (en) 2014-09-02 2020-06-30 Apple Inc. Magnetically doped adhesive for enhancing magnetic coupling
US11378629B2 (en) 2016-06-22 2022-07-05 Viewray Technologies, Inc. Magnetic resonance imaging
US10327326B2 (en) 2017-08-17 2019-06-18 Apple Inc. Electronic device with encapsulated circuit assembly having an integrated metal layer
US11209509B2 (en) * 2018-05-16 2021-12-28 Viewray Technologies, Inc. Resistive electromagnet systems and methods
WO2020155137A1 (fr) 2019-02-02 2020-08-06 Shanghai United Imaging Healthcare Co., Ltd. Système et procédé de radiothérapie
EP4113146B1 (fr) * 2021-06-30 2025-05-07 Siemens Healthineers AG Dispositif d'imagerie par résonance magnétique comportant une unité de génération de champ de forme concave
JP2024098334A (ja) * 2023-01-10 2024-07-23 キヤノンメディカルシステムズ株式会社 静磁場磁石及び磁気共鳴イメージング装置
EP4530651B1 (fr) * 2023-09-26 2025-10-29 Bruker France S.A.S. Dispositif rmn à champs combinés et à commutation rapide pour 2fnmr

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0186998A1 (fr) * 1984-12-21 1986-07-09 Oxford Advanced Technology Limited Système d'aimants
US4902995A (en) 1988-07-05 1990-02-20 General Electric Company Cable suspension system for cylindrical cryogenic vessels
EP0424808A1 (fr) * 1989-10-21 1991-05-02 Kabushiki Kaisha Toshiba Appareil d'imagerie par résonance magnétique
US5345208A (en) 1993-05-26 1994-09-06 General Electric Company Pole face design for a C-shaped superconducting magnet
US5410287A (en) * 1994-04-05 1995-04-25 General Electric Company Open MRI magnet with uniform magnetic field

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2050062B (en) * 1979-05-25 1983-07-20 Emi Ltd Coils for electromagnets with uniform fields
JPS62117541A (ja) * 1985-11-18 1987-05-29 株式会社東芝 磁気共鳴イメ−ジング装置
DE3907927A1 (de) * 1989-03-11 1990-09-20 Bruker Analytische Messtechnik Magnetsystem
US5023554A (en) * 1989-05-22 1991-06-11 The Reagents Of The University Of California Fringe field MRI
DE4029477C2 (de) * 1989-09-29 1994-06-01 Siemens Ag Tesserale Gradientenspule für Kernspin-Tomographiegeräte
US5153546A (en) * 1991-06-03 1992-10-06 General Electric Company Open MRI magnet
US5389879A (en) * 1992-12-18 1995-02-14 Pulyer; Yuly M. MRI device having high field strength cylindrical magnet with two axially spaced electromagnets
US5448214A (en) * 1994-06-15 1995-09-05 General Electric Company Open MRI magnet with superconductive shielding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0186998A1 (fr) * 1984-12-21 1986-07-09 Oxford Advanced Technology Limited Système d'aimants
US4902995A (en) 1988-07-05 1990-02-20 General Electric Company Cable suspension system for cylindrical cryogenic vessels
EP0424808A1 (fr) * 1989-10-21 1991-05-02 Kabushiki Kaisha Toshiba Appareil d'imagerie par résonance magnétique
US5345208A (en) 1993-05-26 1994-09-06 General Electric Company Pole face design for a C-shaped superconducting magnet
US5410287A (en) * 1994-04-05 1995-04-25 General Electric Company Open MRI magnet with uniform magnetic field

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6958577B2 (en) 2001-05-28 2005-10-25 Esaote, S.P.A. Apparatus for imaging the inner part of a body, particularly for diagnostic imaging thereof
EP1300688A3 (fr) * 2001-10-02 2003-10-15 Esaote S.p.A. Un aimant supraconducteur, en particulier pour appareil d'imagerie RM
US6906519B2 (en) 2001-10-02 2005-06-14 Esaote S.P.A. Superconducting magnet, particularly for MRI imaging apparati and method of using same
US7482808B2 (en) * 2003-02-28 2009-01-27 Hitachi, Ltd. Superconductive magnet apparatus and magnetic resonance imaging apparatus

Also Published As

Publication number Publication date
JPH09168527A (ja) 1997-06-30
US5708362A (en) 1998-01-13
DE59609147D1 (de) 2002-06-06
EP0774670B1 (fr) 2002-05-02

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